Gin-saw-filing machine.



PATENTED APR. 14, 1908.

F, M. SISK. GIN SAW FILING MACHINE.

APPLICATION FILED JAN. 6, 1906.

4 SHEETS-SHEET 1.

' Svwemltov q 4 Roman THE NORRIS PETERS :0, WASHINGTON. u, c.

- No. 884,770. PATENTED APR. 14, 1908.

H F. M. SISK. GIN SAW FILING MACHINE.

APPLICATION FILED JAN. 6 1906.

4 SHEETS-SHEET Z.

E 2 II,

N 884,770. PATENTED 3.114, 1908.

- P. M. SISK.

GIN SAW FILING MACHINE;

APPLIGATION FILED JAN. 6, 19Q6.

' 4 SHEETS-SHEET 8.

l vi in zoom attorney THE NORRIS #57925 cm, WASHINGTON, .-c.

PATENTED APR. 14, 1908.

4 SHEETS-$113131: 4.

FRANCIS M. SISK, OF ATLANTA, GEORGIA, ASSIGNOR, BY TO J. L. DE GIVE, OF ATLANTA,

DIRECT AND MESNE ASSIGNMENTS,

GEORGIA.

GIN-SAW-FILING MACHINE.

Specification of Letters Patent.

Patented April 14, 1908.

Application filed January 6, 1906. Serial No. 294,940.

To all whom it may concern."

Be it known that I, FRANcIs M. SIsK, a

citizen of the United States, residing at At- Like numerals of reference designate like parts in the drawings:

The letter A designates a wooden bar lanta, in the county of Fulton and State of j which is provided with a groove on'its under Georgia, have invented new and useful Imi face into which extends a tongue on the footprovements in Gin-Saw-Filing Machines, of piece V and a tongue on an extension from which the following is a My invention relates that class of saw filing vertically reciprocatory sharpen the saw without mandrel, and the object of provide a machine having reclprocatory file rods and to reciprocate the same on the teeth of the saw in a regular series of reciprocatory rotary motions; to adjust the saw-carrying frame with reference to the saw; to provide means whereby the circular file may cut in the correct position between the teeth, and to throw all the files into inoperative position during the feed of the saw.

' Other objects will become evident in the description of the construction and operation of the device. Q

I attain these objects by the mechanism illustrated in the accompanying drawings, in which:

Figure 1 is a side elevation of the complete machine Fig. 2 is a detail of the frame-work, showing the construction of the supporting frame; Fig. 3 is a front view of Fig. 2; Fig. 4 is a rear view of a part of the leg Fig. 5 is a cross section of the leg taken at V; Fig. 6 is a section of the main operating cam; Fig. 7 is a rear view of the same; Fig. 8 is a detail partly in section of the feeding device and connected parts; Fig. 9 is a detail plan view of the reciprocating file operating mechanism; Fig. 10 is a detail showing the manner of connecting the rock lever with the reciprocating files; Fig. 11 is a plan of the circular file bracket and related parts; Fig. 12 is a vertical section of the same Fig. 13 is a detail side view of the reciprocating files and their operating mechanism Fig. 14 is a front detail view of the same, in connection with the saws; Fig.15 is a cross section of the file and file rods and collar, showing the method of securing the file to the file rod Fig. 16 is a detail of the saw clamp, shown in three positions; Fig. 17 is a front elevation of the supporting forks for maintaining the machine in position upon the saw cylinder; and Fig. 18 is a plan of a part of the ratchet plate. Fig. 19 is a front specification.

machines, in which and circular files removal from the my invention is to detail view of the machine.

to improvements in rice the frame B. The bar is provided with a secure the parts together, thus providing means for adjusting bar.

In the frame B (Fig. 8) is ournaled a short shaft B having secured to the outer end thereof by means of a set screw C a cam C, provided on its inner face with a cam groove C, comprising, as clearly shown in Fig. 7, three symmetrical sections for a purpose to be hereinafter set forth. Upon the shaft B is also secured a pinion D and two cams, D and D In the embodiment herein shown and described the cams D, D and C and the pinion D, are integral, and a crank arm C is provided for rotating the shaft.

In the upper part of the frame B is a stud shaft G, having pivoted thereto a rock-lever G. The rock-lever G is provided with a stud at one side of the center, as shown in Fig. 14,

'which carries a friction roller G running in the cam groove C.

Each of the outer ends of the rock-lever G is provided with a socket in which plays the ball head of a screw g, the said screw being screwed into a threaded opening in a collar H secured by a set screw to a file rod H thus giving a ball and socket connection between the rock-lever and the file rod. Pivoted to the frame B by screws 0, below and upon each side of the stud shaft G, are two bearing blocks 0, each block provided with an upper bearing 0' and a lower bearing O for the file rod H, above and below the G. The lower end of the file rod H is grooved (see Fig. 15) for the reception of the triangular file H, and surrounding said file is a collar H provided with a set screw bearing upon the outer part of the file. In the face of each of the bearing blocks 0 is a series of holes 0* in which are adapted to screw the ends of a torsional spring 0 The bearing blocks are normally inclined so that the files cross each other at an angle of about 30 degrees and by varying the position of the spring 0 a varying degree of pressure by the attachment to the rock-lever deeply files upon the saw may be secured. On their inner edges the bearing blocks 0 are provided with set screws O for a purpose to be hereinafter described.

Journaled in a rearward extension of the frame B is a rock shaft 1 su porting the bell crank lever I, one arm 0 which extends through a suitable opening in the frame B (Fig. 8) into the path of the cam D, while the other arm is pivotally attachedto a pawl arm J. The arm J has attached thereto by a pin and slot connection a wide pawl J adapted to engage the teeth of the saw being operated upon. Pivoted to the extreme rear end of the pawl arm J is a rod J which passes loosely through a hole in the extension of the frame B, and is provided with a nut K to secure it therein. A coiled spring J X surrounds the rod J and tends to press the rod away from the frame B, thus kee ing the pawl in contact with the saw teeth ig. 1).

Secured to the "rearward extension of the frame B by a bolt T, is a slotted fork L having secured to one side thereof and parallel therewith a second fork L, said forks being adapted to support the frame B by resting upon the spacing block U between the saws. For regulating said frame B with relation to the forks L and L, and consequently positioning-the files to the saw teeth, the sup porting member L is provided with a projection or shoulder M adapted to bear against an adjusting pin M which is screw-threaded through an integral eye m on the frame B. Thus by loosening the nut of the bolt T and setting the pin M the files may be set at various positions.

Below and to one side of the shaft B is a bracket B (Fig. 1) provided with an arm R pivoted by means of a screw R to a bracket B extending forwardly from the frame B. The arm R is extended beyond the pivot R and its outer'end is provided with a set screw R adapted to be engaged by the cam D J ournaled in bearings at either end and at the center of the bracket R, is a shaft F (Fig. 12) having secured thereto at the outer end a pinion E adapted to be engaged by the pinion D, and having formed upon its inner end a left-handed screw. Midway of the shaft F is secured a collar R between which collar and the bearing upon each side is a coil spring encircling the shaft for a purpose to be hereinafter described. Through the threaded inner end of the shaft F is a pin E projecting approximately one-eighth of an inch at either side of the same. Over the threaded inner end of the pin is slipped the circular file F, it being provided with keyways for the reception of the pin ends, and a nut F screwed upon the threaded end holds the file securely'in place. A spring R is seated with its lower end in a hole in the bracket R and its upper end in one of a series of holes in the frame B. By placing the upper end in different holes of the series, a varying pressure may be obtained, as desired.

On the lower part of the inner bracket is an extension R adapted to act as a stop when the circular file is lowered by abutting against the part N, described later on.

Owing to the above described arrangement of the collar R and the coil springs R longitudinal movement of the shaft F is permitted to a limited extent, thus providing for the proper seating of the circular file, between the saw teeth.

Attached to the frame B below the bracket R by screws or otherwise is a clamp (Figs. 1 and 16) consisting of two jaws N and B which are secured together by two screws N, and have between them a spacing rib N that runs crosswise thereof. The ends of these jaws are recessed and turned to provide noses, the nose of B slightly offsetting and overlapping the nose of jaw N, and when in applied position on the frame said turned ends project upwardly and a trifle in advance of the circular file F. In this position their function is to receive the periphery of the saw-blade between their co-acting faces for steadying and to deflect the same whereby the saw teeth may be set to the proper angle for sharpening. Said deflection being effected by the end of the jaw B offsetting the end of jaw N. By loosening one of the screws N and tightening the other, this inclination of the saw periphery may be varied.

During the feeding of the saw it is necessary that the files be removed from the saw teeth that time. I provide for this by the construction illustrated in Figs. 8 and 14. P, is a reciprocating bar having a triangular or cone-shaped head. The bar P moves in guides on the frame B and rests with its lower end on the arm I of the bell crank lever I, and the cone-shaped head of the bar bears against the set screw O of the bearing blocks 0 so that when the said bar is elevated by the arm I the cone-shaped head moves the upper ends of the bearing blocks outward and swings the files away from the saw. The bar descends by its own weight.

Having now set forth the structure of my invention, I will proceed to describe its operation as a whole. The device having been placed with the forks L, L, resting on the space blocks betweenthe saws and with the foot V on the floor, the leg V being adjusted to such length as desired, the device is leveled by the nut T and set screw M. Power being applied to the crank, the cams C, D, D and the pinion D are set in motion. The cam C acting on the roller Gr actuates the rock-lever G, which, by means of the ball and socket connection, reciprocates and at the same time partially rotates the file rods H. On account of the peculiar conformation of the cam C three complete reciprocations since the saw commences to turn at p take place during each revolution of the cam. The pinion D rotates the pinion E and consequently the circular file F. These gears are in the ratio of 52 to 17, that is, 52 teeth on the pinion D and 17 on the pinion On account of this one revolution of the pinion D causes 3-1/ 17th of a revolution of the pinion E. In other words, the circular file makes three revolutions and a fraction of a 4th; thus always starting each series of revolutions at a difierent point on the periphery. At the completion of the above movements, the cam D strikes the set screw R and elevates the circularfile from the saw teeth, the cam D strikes the rocker arm L which moves the pawl arm and pawl, thus feeding the saw one tooth. Before the feed takes place, however, the arm I elevates the bar P, which acts on the set screw O to swing the files away from the saw teeth.

It will be noticed from an inspection of the drawings, that the clamping jaws N and B are provided with alined recesses in their upper edges directly below the circular file, and that their ends are upturned. This construction permits the jaws to engage the periphery of the saw in front of and behind the circular file whereby to steady the saw on both sides of the circular file.

Having thus described the construction and operation of my device, what I claim and desire to secure by Letters Patent is 1. In a saw filing machine, the combina tion with the frame, a saw feed of bearing blocks pivotally mounted on said frame, file rods mounted for reciprocation and rotation upon said bearing blocks, a rock lever pivoted betweenthe file rods, means for automatically spreading the file rods during the inoperative movement of said file rods, means for regulating said movements of the bearing blocks, and a universal joint connection between the file rods. and the adjacent ends of the rock lever, whereby the rocking of the lever will reciprocate and partially rotate the file rods.

2. In a saw filing machine of the class described, the combination with the frame provided with an extension on the front thereof, of forks connected with the rear of the frame and adapted to rest upon the space blocks of the saws, a leg comprising a foot piece and grooved bar, said foot piece and the extension of the frame being provided with tongues engaging the groove of the bar whereby to adjust the length of the leg, means for securing the parts in their adjusted position, and filing mechanism in connection with the frame.

3. In a saw filing machine, the combination with the frame, of a sharpening means in the frame, a clamp comprising a plurality of plates connected with the frame directly below said sharpening means and adapted to engage opposite sides of the saw, one of said plates offsetting its adjacent plate for receiving and deflecting the periphery of the saw in front of and behind the file whereby said saw may be held for said sharpening means.

4. In a saw filing machine, the combination with the frame, of a sharpening means in the frame, plates connected with the frame and engaging opposite sides of the saw, said plates having uneven clamping faces whereby to engage and deflect the periphery of the saw in advance of the file.

5. In a saw filing machine, the combination with the frame, of saw sharpening means in connection therewith, and a clamp comprising jaws for engaging the opposite sides of the saw, the engaging face of one of said jaws being concave and the other convex whereby to tension the periphery of the saw.

6. In a saw filing machine, the combination with the frame, of a circular file mounted for rotation thereon, means for rotating the file, and means in connection therewith for moving said file into inactive position at the end of a predetermined series of complete revolutions or fraction of a revolution, whereby to prevent une ual wear of the file.

In testimony w ereof I have hereunto set my hand in presence of two subscribing witnesses.

FRANCIS M. SISK. 

